Hybrid event beds (HEBs) containing matrix (clay)-poor and overlying matrix-rich sandstone facies are increasingly recognised in deep-water systems and differ signiﬁcantly from facies traditionally associated with sediment gravity ﬂow deposition. HEBs are thought to reﬂect deposition from ﬂows whose turbulence became increasingly suppressed due to the enrichment of cohesive clay within the ﬂow. Conceptual and experimental work has stressed either the longitudinal or vertical redistribution of cohesive clay material within ﬂows; resulting end-member models tend to envisage the development of discrete rheological zones along the ﬂow vs. the progressive rheological evolution of the whole ﬂow. HEBs are largely documented in the distal, unconﬁned regions of deep-water systems with only a few studies having considered their development in association with conﬁning sea-ﬂoor topography. Prior to this work, no case studies existed from fully contained (ponded) basins. This work presents case studies of HEB-prone deep-water systems from unconﬁned(intra-Springar Sandstone, Norwegian Sea),conﬁned (Mam Tor Sandstone and Shale Grit, N England and contained (Costa Grande Member, NW Italy) basins. Principal ﬁndings are: 1) Hybrid-ﬂow development is complex in that a ﬂow may become increasingly clay-rich and turbulence-suppressed in hindward regions whilst headward regions remain non-cohesive, and undergo downstream turbulence-enhancement driven by declining sediment concentration, 2) Styles of HEB suggest that ﬂows can be characterised by both longitudinal and vertical redistribution of cohesive material, indicating that current models for hybrid ﬂow are not mutually exclusive. 3) In conﬁned or contained settings, HEBs are not always laterally-restricted or systematically variable in their depositional character with respect to conﬁning topography as documented in previous studies. Thus, in topographically complex settings, conﬁnement is not always the trigger mechanism for hybrid-ﬂow development; prior development may occur in relatively distal conﬁned settings where a greater ﬂow run-out distance, and thus time for other mechanisms promoting ﬂow transformation to operate, is achieved. 4) In contained settings complex patterns of ﬂow expansion and conﬁnement are interpreted to; a) prevent the development of slope-localised HEBs; and b) promote the development of relatively sandy HEBs.